Extensible drill press



Jan. 20,1948. J. ALICK 2,434,732

EXTENSIBLE DRILL PRESS Filed June :50, 1944 2 Sheets-Sheet 1 JINVENTOR.

Patented Jan. 20, 1948 v UNITED? STATES. PATENT OFFICE EXTENSIBLE DRILL DRESS Jame'sAlick, New York, N. Y;

. Application .Iune30, 1944, Serial No. 544,022

,,Thisinventionarelates to drill-presses; and more particularly. to, the. kind which have an extensible drill-head, the latter being secured upon the drill framein such ,amanrier as to allow the extension ofjthe drill-chuck to various positions facilitating thedrilling of'holes inpastings and other articles, without. necessitatin the moving of the workirorn itspriginalposition upon the drill table,

The-mai .obl'fict of' this invention is, therefore, to. rovid a drillenress wh ch, d e enti ins. from drill. pr ss s. al eady e will be equipped. with a drillghead. that is attached to h drill ,frameofi the, pltss such a manner as .t o allow for substantial ad ustment towards oravvayI from. thesaid drill frame. standard drill-presses utilizedat resent in shops and factoriesnwhen. a casting oruother piece of work has to be .dri1led.. theccn ers oi. th holes e l out ,befQre-hand uponihework by the mechanic or draftsman. Oncethe centers, of the holes to be. drilled. are located, they are .marked' by means. ofac nter punch,. and the workis placed uponthe table OfIhGjlIiH EI'ESS to drill the holes. With the drill-press of the present invention, uch prelim nar m k n an ed P d with. asnallthatis required isto mark the center of thefirsthole ,to, be drilled, and then by simply followin the dimensions andremarks of adrawing or, blueprint the. operator can ad ust the head of the drill inany position and angle required; and proceed, to. drill the holes by just watching the scale that is etched uponthe extensible horizontal drillehead supports, and the angle ofv degrees upon the rotating members of the drill-press. Thus the time for marking all the various holes .to be drilledis saved, and the work does not haveto be touched from the timeit is secured to the drill table until all the holes have been drilled. This is an important feature when the casting'or work to be drilled is tooheavy to be moved or too hardto besccured in different positionsv upon the table ofthe drill press.

A furtherobject of this invention iSt'O' provide a drill-press. which willhave an extensible drillhead.

Another object oi this invention is to, provide means facilitating the extension of said, drillhead away from or towards the drill frame of the press.

.Still. another object of this invention is to provide a drill-press'andmeans thereon for extend ing the drill-head away from ortowards the frame of thepless; dispensing-with the Changing ofihe posi on. Of'the work up t ed il t Stillanother object of thisinvention isto prcvide a drill-presshaving an extensible drill-head and means for extending or retracting saiddrillhead towards or away-from thedrillframe, facilitating the drillin of variousholes in a work without changingtheposition of saidwork upon the drill table of the press.

An additional object of this invention is to provide a hand wheel and gear and rack means thereon to facilitate" the extension orretraction of said ad ustable' drill -head towards or away from the frame of the drill-press.

A still further object of this inventionisto provide means for rotating the drill head circumierentiallyaround the frame of the drill-press, and scale means thereon for regulating the degree ofrotation around the frame of the drillpress.

Still another object of thisinvention is to provide an extensible drill-head and adjustable means for adjusting said drill-head awayfrom or towards the framed the drill-press, and scale means thereon for regulatingth-e distance between the adjustable; drill-headfand the frame of the machine.

Other objects and advantages of this invention will hereinafter appear as the description ofthis invention will proceed.

Referring to figures:

Fig. 1 is. a perspective view of the drill-press showing the extensibledrill-head, thehandle for extending or retracting: said drill-head. away from or towards theirame of the machine, and the manner in which theretractablehead is supported upon the extending rods which are secured to the motor operating the-drill, chuck shaft.

Fig.2 is-aside viewof the drill-press showing the retractable drill-head and other parts of the press,.as also the scale. etchedupon the rods supporting the headto the frame of the press,

Fig. 3 is a section taken on the line 3.3 of Fig. 2, showingthemanner the extensiblerods are attached to therhead oi the press and to the casting supportin the motor.

Fig- 4: is a section taken onthe line 44 of Fig, 2, showing the mannerthe extensible rods are. locatedwith n the. supporting frame of the drill-press and. the way, the, rods are retracted by means. of gears and sea r ck nd thro h the use of a. manuallyoperated wheel;

Fig- 5 is a section taken on the line 55 of Fig. 4, showing the manner the. extensible rods are located withinthe supporting casting, and

the manner the operating spur gears-arein mesh w th the rack operating theex-tensiblerodse Fig, 6 is a sketch showing the manner in which a piece of work is drilled upon the drill-press of the present invention, first, by drilling one hole, and from there on, by means of the scale etched upon the extensible rods and the marking of degrees upon the supporting head; other holes can be drilled without removing the work from the drill plate, or changing its position upon it.

Referring to Fig. 1, numeral 29 designates the frame of the drill-press proper which consists of a column 2|, a base 22, and an adjustable table 23. The table 23 can be moved vertically upon the column 2| by loosening the table clamp 24, while the adjustable drill-head 25 can be moved horizontally by means of a pair of slidable bars 26 and 21 which are slideably attached to the drill support 28.

One end 29 and 39 of the slideable bars 25 and 21 is rigidly attached to the bushings 59a and 3| of the drill-head 25, while the opposite ends 32 and 33 of the slideable bars 25 and 21 are attached to bushings 84 and 35 of the motor plate 36. The motor 3'! is attached by means of screws 38 to the plate 35 and has a three stage pulley 39 which drives the chuck shaft 49 by means of a secondary V-pulley 4| and a V-belt 42.

The drill-head 25 has a regulation feed lever 43, a depth stop 44, and a quill lock 45. A guard 45 is located above and over the -pulley 4| to protect the operator when operating the machine.

The slideable bars 25 and 2'! are equipped at the lower part thereof with a gear rack 41 and 48 which is attached to the bars 25 and 21 by means of screws, rivets or welding. A pair of spur gears 49 and 55 is in mesh with the gear racks 41 and 48 while being keyed to a shaft which is'rotated by a four handled wheel 52. The shaft 5|, at its extreme left end, has a t readed extension 53 and a tightening nut 54 which is manually tightened by the handle 55. Another tightening nut 56 is secured at t e upper portion 28. of the supporting frame 28, and ha a handle 51. The tightening nut 55 is used to secure the drill support 28 to the column 2| to prevent the former from rotating or wabbling.

Operation The operation of the drill-press shown and described in Figs. 1 to 6 inc usive is similar to the operation of standard drill-presses, but differentiating in the manner in which the holes in the work on the drill table are drilled. While in standard drill-presses the work upon the drill table has to be moved under the center of the drill for every hole that must be dr lled, in the drill-press described in this specification, the work upon the drill table remains stationary, while the drill chuck supporting the drill is moved.

For this purpose, the chuck frame 25 is secured to a pair of extensible rods 25 and 21, which are secured to the shaft frame and are made to slide within openings located upon a drill frame 28 which is attached to the column 2| supporting the drill proper. The rods 26 and 21 also support a motor plate 35 which carries the electric motor 31. It can be seen from Figs. 1 and 2 that the drill shaft 4!] is operated from the motor 31 by means of a pair of V-pulleys 39 and 4| and a V-belt 42. It can be also seen that as the rods 25 and 21 are moved, the motor and the drill frame are taken along so that the drill is continuously operated even while extendin or retracting the chuck frame 25 from or towards the drill frame 28.

Referring to Fig. 2, the rods 26 and 21 are equipped with gear racks 41 and 48 which mesh with the spur gears 49 and 50. The spur gears 49 and 50 are keyed to a shaft 5| which is manipulated by the operator of the drill-press by means of a four-armed handle 52 whenever it is required to extend or to retract the rods 26 and 21. To facilitate the clamping of the extensible rods in any chosen position, the shaft 5| is equipped with a clamp 54 which is threaded upon an extension 53. By turning the clamp 54 by means of the handle 55 one way or the other, the shaft 5| is made fast to the drill frame 28, or it is loosened up to allow its rotation.

To facilitate the rotation of the extensible chuck frame 25 in an are around the drill frame 28, the latter is rotatably attached to the column 2| supporting the drill press proper. A clamp 56 operated by means of a handle 51 serves the purpose of disconnecting the drill frame 28 from the column 2| to allow its rotation.

To illustrate the manner in which this new drill-press is operated, if a number of holes has to be drilled in casting (W), as it is shown in Fig. 6, the extensible drill-chuck 25 is at first set to drill the hole (I). After drilling the hole (I), the second hole (II) is drilled by swinging the extensible chuck frame 25, 40 degrees to the left, as shown on the drawing, and in accordance with the scale (not shown) for angular move ment which is etched upon the sleeve 5|. Then, by securing the drill frame 28 in position, the operator turns upon the handle 52, and at the same time watching the inch scale (S) which is etched upon the rod 26 until the right amount of inches (B) is read. Subsequently, the chuck frame 25 is locked in position by means of the clamp 54 operated by the arm 55, and then, the operator proceeds to drill the hole (II).

In a similar manner, the hole (III) is drilled by swinging the drill chuck 25 this time 45 degrees to the right, and by extending the same at an amount of (C) inches from the hole (I). Finally, the fourth hole (IV) is drilled by returning the chuck frame 25 to zero position and by extending the same an amount of (E) inches from the first hole (I). In a similar manner, the other holes can be drilled in the casting (W) without necessitating the changing of position of the casting upon the drill table.

From the foregoing description of the construction and operation of the drill-press shown in Figs. 1 to 6 inclusive, it can be seen that it is well adapted for drilling holes without necessitating the changing of the position of the article to be drilled upon the drill table. The drill-press here described is simply constructed and conveniently operated, and although it is obvious that it is susceptible to some changes and modifications, they are possible without departing from the principles and the spirit thereof, and for this reason I do not wish to limit myself to the exact and precise arrangement and formation of the several parts herein shown, in carrying out my invention in practice, except as claimed.

Having now described my invention, what I claim is:

1. In an extensible drill-press of the class described including an upright support, a drill table held upon said support, the upper portion of said support including a drill-chuck holder having a horizontally slidable drill-chuck frame, a ver tical drill-shaft rotatably mounted in said drillchuck frame, said shaft being provided with a drill clamp and a drill and being rotated by means of a belt-pulley secured thereto, and means for sliding said drill-chuck to facilitate adjustment of said drill with locations for holes to be drilled in work secured to said table; said slideable means comprising a pair of extensible rods, one end of said rods being secured to said drill-chuck, the other end of said rods being secured to a motor support member, said rods being slideably held within holes in said drill-chuck holder, and gear means included for sliding said bars or rods in said support, said gear means comprising a pair of gear racks held to said rods and being in mesh with a pair of spur gears held to a common shaft and being manually rotated by means of a handle, the motor support member having a motor including a pulley, said motor rotating said pulley upon said drill-shaft by means of a belt, said drill-chuck support being slideably held upon said upright support.

2. The same structure as set in claim 1, and

'a collar being held upon said upright support and REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 648,431 Porter May 1, 1900 1,030,034 Thorssell et a1 June 18, 1912 1,766,115 Einstein June 24, 1930 1,838,303 Fairchild Dec. 29, 1931 FOREIGN PATENTS Number Country Date 1,794 Great Britain 1871 

